68 research outputs found
A Strange Land and a Peculiar Problem: Using Local Knowledge to Resolve Ambiguous Property Descriptions in Appalachia
Conveying property in Appalachia can be somewhat like a box of chocolates: âYou never know what youâre gonna get.â Carved by ancient rivers and winding streams, the seemingly never-ending âhollersâ and hills of Appalachia can disorient even the best navigator. Couple the regionâs rugged topography with an already ambiguous demarcation system, and properties once mapped by metes and bounds descriptions become impossible to re-create with any sort of certainty. Thus, though rooted in a desire for clarity, the combination of mountainous terrain and imperfect demarcation results in a property system riddled with ambiguity. Due to this inherent definitional problem in Appalachian land, the lines on a map do not always align with widespread local knowledge. The result is even further uncertainty, as variances between local understandings of place and federally standardized definitions of property cause confusion over which definition is correct, a problem this Note defines as âvertical ambiguity.â When such variances find their way into property descriptions, oneâs answerâlocal or federalâcan determine whether entire parcels of land are transferred. The question then becomes how to properly make that choice. This Note offers a clear answer: when such conflicts arise, there should be a presumption in favor of localknowledge
Effects of herbivory on the reproductive effort of 4 prairie perennials
BACKGROUND: Herbivory can affect every aspect of a plant's life. Damaged individuals may show decreased survivorship and reproductive output. Additionally, specific plant species (legumes) and tissues (flowers) are often selectively targeted by herbivores, like deer. These types of herbivory influence a plant's growth and abundance. The objective of this study was to identify the effects of leaf and meristem removal (simulated herbivory within an exclosure) on fruit and flower production in four species (Rhus glabra, Rosa arkansana, Lathyrus venosus, and Phlox pilosa) which are known targets of deer herbivory. RESULTS: Lathyrus never flowered or went to seed, so we were unable to detect any treatment effects. Leaf removal did not affect flower number in the other three species. However, Phlox, Rosa, and Rhus all showed significant negative correlations between seed mass and leaf removal. Meristem removal had a more negative effect than leaf removal on flower number in Phlox and on both flower number and seed mass in Rosa. CONCLUSIONS: Meristem removal caused a greater response than defoliation alone in both Phlox and Rosa, which suggests that meristem loss has a greater effect on reproduction. The combination of leaf and meristem removal as well as recruitment limitation by deer, which selectively browse for these species, is likely to be one factor contributing to their low abundance in prairies
Recommended from our members
What Causes Social Marketing Programs to Fail? A Qualitative Study
This paper addresses the key factors that cause social marketing programs to fail. It argues that understanding these failures offers greater insight to researchers and practitioners than publications solely focused on successes. As the majority of practitioner-oriented social marketing research focuses on how to develop a successful program, we identify a tendency to ignore failed programs. We suggest that both researchers and practitioners can arguably learn more useful lessons from failures rather than successes. Thus, this paper contributes to social marketing literature by exploring the key causes of social marketing failures.We conducted ten semi-structured interviews with social marketing practitioners recruited using a purposive sampling technique. We identify four elements responsible for the failure of social marketing programs, each centered on the planning and implementation stage. Firstly, formative research at the earliest stages of program planning is often neglected, resulting in a limited understanding of the target audience. Relatedly, extant research is frequently overlooked during this early planning stage, and this failure to use available social marketing theory and frameworks can result in program performing poorly. Thirdly, for a program to be successful, it must be congruent with the goals of the wider environment and infrastructure within which it is situated; adopting too narrow a focus can also result in a limited impact or program failure. Lastly, we found a common issue relating of stakeholder mismanagement, specifically around issues of power imbalance and mismanaged expectations resulting in social marketing program failing to launch. Researchers and practitioners must acknowledge that social marketing programs do indeed fail but recognize that in these failings lies insight into how to enhance future practice
Tocilizumab in Hospitalized Patients with Severe Covid-19 Pneumonia
BACKGROUND
Coronavirus disease 2019 (Covid-19) is associated with immune dysregulation and hyperinflammation, including elevated interleukin-6 levels. The use of tocilizu- mab, a monoclonal antibody against the interleukin-6 receptor, has resulted in better outcomes in patients with severe Covid-19 pneumonia in case reports and retrospective observational cohort studies. Data are needed from randomized, placebo-controlled trials.
METHODS
In this phase 3 trial, we randomly assigned patients who were hospitalized with severe Covid-19 pneumonia in a 2:1 ratio receive a single intravenous infusion of tocilizumab (at a dose of 8 mg per kilogram of body weight) or placebo. Approxi- mately one quarter of the participants received a second dose of tocilizumab or placebo 8 to 24 hours after the first dose. The primary outcome was clinical status at day 28 on an ordinal scale ranging from 1 (discharged or ready for discharge) to 7 (death) in the modified intention-to-treat population, which included all the patients who had received at least one dose of tocilizumab or placebo.
RESULTS
Of the 452 patients who underwent randomization, 438 (294 in the tocilizumab group and 144 in the placebo group) were included in the primary and secondary analyses. The median value for clinical status on the ordinal scale at day 28 was 1.0 (95% confidence interval [CI], 1.0 to 1.0) in the tocilizumab group and 2.0 (non-ICU hospitalization without supplemental oxygen) (95% CI, 1.0 to 4.0) in the placebo group (between-group difference, â1.0; 95% CI, â2.5 to 0; P=0.31 by the van Elteren test). In the safety population, serious adverse events occurred in 103 of 295 patients (34.9%) in the tocilizumab group and in 55 of 143 patients (38.5%) in the placebo group. Mortality at day 28 was 19.7% in the tocilizumab group and 19.4% in the placebo group (weighted difference, 0.3 percentage points (95% CI, â7.6 to 8.2; nominal P=0.94).
CONCLUSIONS
In this randomized trial involving hospitalized patients with severe Covid-19 pneu- monia, the use of tocilizumab did not result in significantly better clinical status or lower mortality than placebo at 28 days. (Funded by F. HoffmannâLa Roche and the Department of Health and Human Services; COVACTA ClinicalTrials.gov num- ber, NCT04320615.
Patient acceptable symptom state in scleroderma: results from the tocilizumab compared with placebo trial in active diffuse cutaneous systemic sclerosis
OBJECTIVES:
Patient acceptable symptom state (PASS) as an absolute state of well-being has shown promise as an outcome measure in many rheumatologic conditions. We aimed to assess whether PASS may be effective in active diffuse cutaneous SSc differentiating active from placebo.
METHODS:
Data from the phase 2 Safety and Efficacy of Subcutaneous Tocilizumab in Adults with Systemic Sclerosis (faSScinate) trial were used, which compared tocilizumab (TCZ) vs placebo over 48 weeks followed by an open-label TCZ period to 96 weeks. Three different types of PASS questions were evaluated at weeks 8, 24, 48 and 96, including if a current state would be acceptable over time as a yes vs no response and Likert scales about how acceptable a current state is if remaining over time. Additional outcomes assessed included modified Rodnan skin score, HAQ disability index (HAQ-DI), physician and patient global assessments on a visual analogue scale, CRP and ESR.
RESULTS:
The placebo group consisted of 44 patients and the TCZ group had 43 patients. At baseline, 33% achieved a PASS for all three PASS questions, with the proportion increasing to 69, 71 and 78%, respectively, at 96 weeks. Changes in PASS scores showed a moderately negative correlation with HAQ-DI and patient and physician global assessments visual analogue scales, which indicates expected improvements as PASS improved. The PASS question, 'Considering all of the ways your scleroderma has affected you, how acceptable would you rate your level of symptoms?' showed significant correlations with patient-reported outcomes and differentiating placebo vs TCZ at 48 weeks (P = 0.023). Conclusion: PASS may be used as a patient-centred outcome in SSc, especially as a 7-point Likert scale. Further validation is required to determine the utility as an outcome measure in trials and clinical practice
Children as vulnerable consumers: a first conceptualisation
© 2015 Westburn Publishers Ltd. Understandings of consumer vulnerability remain contentious and despite recent developments, models remain unsuitable when applied to children. Taxonomic models, and those favouring a âstateâ- or âclassâ-based approach have been replaced by those attempting to tackle both individual and structural antecedents. However, these are still overly individualistic and fail to progress from an artificial view that these dimensions work separately and independently. In contrast, the new sociology of childhood conceptualises childhood as a hybridised, fluid combination of structure and agency. This paper introduces this approach, new to the consumer vulnerability field, and proposes that it has considerable implications for the way that childrenâs consumer vulnerability is theorised and researched, and for the formulation of policy
Tocilizumab in Hospitalized Patients with Severe Covid-19 Pneumonia
BACKGROUND
Coronavirus disease 2019 (Covid-19) is associated with immune dysregulation and hyperinflammation, including elevated interleukin-6 levels. The use of tocilizumab, a monoclonal antibody against the interleukin-6 receptor, has resulted in better outcomes in patients with severe Covid-19 pneumonia in case reports and retrospective observational cohort studies. Data are needed from randomized, placebo-controlled trials.
METHODS
In this phase 3 trial, we randomly assigned patients who were hospitalized with severe Covid-19 pneumonia in a 2:1 ratio receive a single intravenous infusion of tocilizumab (at a dose of 8 mg per kilogram of body weight) or placebo. Approximately one quarter of the participants received a second dose of tocilizumab or placebo 8 to 24 hours after the first dose. The primary outcome was clinical status at day 28 on an ordinal scale ranging from 1 (discharged or ready for discharge) to 7 (death) in the modified intention-to-treat population, which included all the patients who had received at least one dose of tocilizumab or placebo.
RESULTS
Of the 452 patients who underwent randomization, 438 (294 in the tocilizumab group and 144 in the placebo group) were included in the primary and secondary analyses. The median value for clinical status on the ordinal scale at day 28 was 1.0 (95% confidence interval [CI], 1.0 to 1.0) in the tocilizumab group and 2.0 (non-ICU hospitalization without supplemental oxygen) (95% CI, 1.0 to 4.0) in the placebo group (between-group difference, â1.0; 95% CI, â2.5 to 0; P=0.31 by the van Elteren test). In the safety population, serious adverse events occurred in 103 of 295 patients (34.9%) in the tocilizumab group and in 55 of 143 patients (38.5%) in the placebo group. Mortality at day 28 was 19.7% in the tocilizumab group and 19.4% in the placebo group (weighted difference, 0.3 percentage points; 95% CI, â7.6 to 8.2; nominal P=0.94).
CONCLUSIONS
In this randomized trial involving hospitalized patients with severe Covid-19 pneumonia, the use of tocilizumab did not result in significantly better clinical status or lower mortality than placebo at 28 days. (Funded by F. HoffmannâLa Roche and the Department of Health and Human Services; COVACTA ClinicalTrials.gov number, NCT04320615
Different Prey Resources Suggest Little Competition Between Non-Native Frogs and Insectivorous Birds Despite Isotopic Niche Overlap
Non-native amphibians often compete with native amphibians in their introduced range, but their competitive effects on other vertebrates are less well known. The Puerto Rican coqui frog (Eleutherodactylus coqui) has colonized the island of Hawaii, and has been hypothesized to compete with insectivorous birds and bats. To address if the coqui could compete with these vertebrates, we used stable isotope analyses to compare the trophic position and isotopic niche overlap between the coqui, three insectivorous bird species, and the Hawaiian hoary bat. Coquis shared similar trophic position to Hawaii amakihi, Japanese white-eye, and red-billed leiothrix. Coquis were about 3 â° less enriched in ÎŽ15N than the Hawaiian hoary bat, suggesting the bats feed at a higher trophic level than coquis. Analyses of potential diet sources between coquis and each of the three bird species indicate that there was more dietary overlap between bird species than any of the birds and the coqui. Results suggest that Acari, Amphipoda, and Blattodea made up \u3e90% of coqui diet, while Araneae made up only 2% of coqui diet, but approximately 25% of amakihi and white-eye diet. The three bird species shared similar proportions of Lepidoptera larvae, which were ~25% of their diet. Results suggest that coquis share few food resources with insectivorous birds, but occupy a similar trophic position, which could indicate weak competition. However, resource competition may not be the only way coquis impact insectivorous birds, and future research should examine whether coqui invasions are associated with changes in bird abundance
A practice theory approach to primary school physical activity: opportunities and challenges for intervention
A significant body of critical scholarship exists problematizing the dominant behavioural-individualist approaches to public health policy and intervention, and practice theories have been noted for their potential in providing an alternative. Childrenâs physical activity in primary school settings continues to be a major area of attention in public health, yet no critical examination of a practice theory approach exists in this context. This paper addresses this gap by applying the prevalent three-elements model of practices to the case of childrenâs school-based physical activity. Drawing on focus group, interview and observation data from pupils, staff and parents at one primary school setting in England, our analysis highlights; first, how the configurations of (a) physical resources (e.g. playground space and equipment), (b) practical know-how (e.g. a skilled understanding of performing the activity), and (c) the socio-cultural significance of practices (e.g. the values and meanings of the activity) impact how, and whether childrenâs physical activity happens, and is sustained or interrupted; and second, by showing how physically active practices are contingent on being simultaneously in harmony or conflict with other routinized practices of the school day. We conclude that the three-elements model offers a helpful framework for understanding school physical activity which de-centres the individual, but that there are challenges in using this analysis to support primary schools as they attempt to enable physically active practices more effectively. Further research is required to develop and evaluate a practice theory approach to promoting childrenâs physical activity
Different prey resources suggest little competition between non-native frogs and insectivorous birds despite isotopic niche overlap
- âŠ